Agile requirements validation ensures that requirements are clear, feasible, and actionable before they are implemented in an iteration. This aligns with Agile principles of delivering value incrementally and avoiding waste.

Key Considerations:

Accurate Estimation for Sprint Planning: While estimation is important, it is not the primary purpose of requirements validation.

Correctness of Backlog Items: Ensuring correctness is part of validation but applies to all backlog items, not just those allocated to an iteration.

Testing Requirements: Testing occurs during or after development, not as part of validation.

Readiness for Development: Validation ensures that requirements are well-defined, understood, and feasible before they are developed.

Evaluation of Each Option:

A. To ensure estimation for sprint planning is accurate:Estimation accuracy is important but not the primary purpose of validation.Conclusion: This is not correct .

B. To ensure any requirements added to the backlog are correct:Correctness applies to all backlog items, not just those allocated to an iteration.Conclusion: This is not correct .

C. To ensure that requirements allocated to an iteration have been tested:Testing occurs after development, not during validation.Conclusion: This is not correct .

D. To ensure any requirements allocated to an iteration are ready to be developed:This is the primary purpose of Agile requirements validation—to ensure requirements are clear, actionable, and feasible before development begins.Conclusion: This is correct .

Final Recommendation:

The purpose of Agile requirements validation is:

D. To ensure any requirements allocated to an iteration are ready to be developed.